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Q.

Identify A and B.
A + NaOH $\to$ Na₂SnO₂ + H₂
B + NaOH $\to$ Na₂PbO₂ + H₂O

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a

$Sn + H_{2} O, Pb (OH)_{2}$

b

$Sn, Pb (OH)_{2}$

c

$Sn + H_{2} O, Pb {({NO}_{3})}_{2}$

d

$Sn, Pb {({NO}_{3})}_{2}$

answer is B.

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Detailed Solution

$Sn + 2 NaOH ⟶ \underset{Sodium stannate}{{Na}_{2} {SnO}_{2}} + H_{2}$

$Pb (OH)_{2} + 2 NaOH ⟶ {Na}_{2} {PbO}_{2} + 2 H_{2} O$

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